Resin Composition Excellent in Flame Retardance

A process for producing a resin composition comprising:

• a polyamide (A);
• a polyphenylene ether (B);
• and
• at least one phosphinate (C) selected from the group consisting of a phosphinate represented by formula (I) below, a diphosphinate represented by formula (II) below, and condensation products thereof, comprising:
• adding the component (C) into a molten mixture of the component (A) and the component (B), the formulas (I) and (II) being represented by:
• wherein R1 and R2 are the same or different and each represent straight-chain or branched C1 to C6 alkyl and/or aryl, or phenyl;
• R3 represents straight-chain or branched C1 to C10 alkylene, C6 to C10 arylene, C6 to C10 alkylarylene, or C6 to C10 arylalkylene;
• M represents at least one selected from the group consisting of calcium (ion), magnesium (ion), aluminium (ion), zinc (ion), bismuth (ion), manganese (ion), sodium (ion), potassium (ion), and a protonated nitrogenous base;
• m represents 2 or 3;
• n represents 1 to 3;
• and x represents 1 or 2.

A process for producing a resin composition comprising:

• a polyamide (A);
• a polyphenylene ether (B);
• at least one phosphinate (C) selected from the group consisting of a phosphinate represented by formula (I) below, a diphosphinate represented by formula (II) below, and condensation products thereof;
• an appearance-improving agent (D);
• and
• an impact modifier (E), comprising at least the following two steps of:
• (1) mixing the appearance-improving agent (D) with at least one selected from the group consisting of the polyamide (A), the polyphenylene ether (B), and the impact modifier (E) to produce a master batch;
• and
• (2) melt-kneading the master batch with the residual components, the formulas (I) and (II) being represented by:
• wherein R1 and R2 are the same or different and each represent straight-chain or branched C1 to C6 alkyl and/or aryl, or phenyl;
• R3 represents straight-chain or branched C1 to C10 alkylene, C6 to C10 arylene, C6 to C10 alkylarylene, or C6 to C10 arylalkylene;
• M represents at least one selected from the group consisting of calcium (ion), magnesium (ion), aluminium (ion), zinc (ion), bismuth (ion), manganese (ion), sodium (ion), potassium (ion), and a protonated nitrogenous base;
• m represents 2 or 3;
• n represents 1 to 3;
• and x represents 1 or 2.